The story is about Rose and Ruby who are conjoined twins that are connected at the head. The book is written as if Rose was writing and the book was her autobiography. Ruby contributes chapters to the story as well.The story itself is sweet. Rose tells the reader everything about her life: how her aunt and uncle (who raised them) met to the fact that she will likely die soon because of a brain aneurysm. Over the course of the book, I felt like I really got to know Rose and Ruby because of how much of their life I knew (even the horrible things that they don't talk about with other people). Ruby pipes in with her perspective on some of what Rose is talking about and some things she remembers from growing up.The story telling is all over the place and isn't in chronological order. It's a bit difficult to keep a timeline of the story straight. One of my biggest pet peeves about the book was how one sister would drop a bombshell on the reader because she thought the other sister had already mentioned the issue and then they wouldn't speak of the issue again or they would bring it up pages later. SO annoying!!If I had been better in science I might have gone on to study medicine. Since I'm not strong in sciences and yet still love medical 'stuff', I love watching medical shows. This book was right up my alley. I guess it's technically more human interest than medical but it was still very interesting to read. The author did a great job of making it very clear that Ruby and Rose are two different people with two different personalities. Even 'their' writing styles were very different.One interesting thing to note is I came across this book because is was on the ALA's best books for Young Adults list so I assumed it would be a YA book. I guess it could technically be considered YA but it seemed more of an 'adult' book because the protagonists were adults. When I think of YA, I think of protagonists being like 12-19 years old. I really can't think of many YA books that don't meet that criteria.Rating3/5It was a sweet story that kept me reading but it wasn't anything that totally rocked my world. I recommend it if you're looking for something light and a fairly quick read.